Britain’s Labour Party leader Ed Miliband says that a Labour government would boost the national minimum wage to £8 an hour, an increase of about £60 per week, by 2020. He says the UK economy is booming, and the low-paid should get a bigger share of it.
Actually, at present rates of growth, the minimum wage will be close to £8 in 2020 anyway, so this is a one of those political sensations that doesn't amount to much. Even so, it is foolhardy now to commit UK businesses to pay any specific figure in 2020, since anything could happen in the meantime.

The minimum wage gets unthinking politicians (and not just Labour leaders) dewy-eyed. 'We can't have people being paid a wage that isn't enough to live on.' 'Businesses should pay their workers more, and take less profit.' 'The minimum wage hasn't killed jobs as the doomsayers say.' You know the story.

In fact, high minimum wages do destroy jobs. in particular, they destroy those starter jobs, the low-paid, temporary jobs that once gave young people their first step on the jobs ladder – pumping petrol (as I did), stacking bags in supermarkets, ushering people to their seats at the flicks. Now those jobs don't exist, because they are not worth the minimum wage (plus all the National Insurance and the burden of workplace regulation that goes with them – a particular burden on small firms). So we have a million young people out of work.

As for profit, try using that argument on anyone running a small business, already weighed down by taxes, rates, and regulation. Often they are getting less than their lowest-paid employees, and working longer hours for it Higher minimum wages mean they can afford to employ fewer people, or provide less generous perks and conditions.

I don't want to live in a country where people can't afford to live on what they take home either. That is why we have a welfare system, to top up the earnings of the lowest paid. We need a negative income tax – above the line, you pay tax, below the line, you get cash benefits – structured so that you are always better off in work than out of it. A paying job, even a low-paid job, is the best welfare system the human mind can devise.

And we must take low-paid people out of tax and national insurance entirely. Then more small firms could afford to take on more low-skilled workers and give them that first step on the jobs ladder.

If we could simply vote ourselves higher pay, why stop at £8? Why not fix the minimum wage at £800 an hour. The answer is obvious. The only people who would be worth that amount to anyone would be a few Premier League footballers, rock stars, investment bankers and high-class hookers. The rest of us would be out of a job.

The minimum wage does no harm to people who are already earning it, though it does them no good either. But it does positive harm to those earning less, or those who cannot get a job at all. The former will be let go, or will have to endure worse conditions; the latter will find it very much harder to get a job. And all that, of course, has already happened.